Ergonomic Guidelines – Using Four-Wheel Carts in Roofing, Part Two Dr. Ken-Yu Lin and Dr. Zhenyu Zhang, SHARE Lab College of Built Environments, University of Washington In last month’s issue, we discussed overexertion in cart operations, cart condition and maintenance and tire selection. In this article we’ll address workspace setup and site pre-task planning.
Example 1: Poor workspace setup
Workspace Setup – Space Constraints
Space constraints or tight spaces, are common on a commercial roofing site. They come from physical restrictions of the site or are a by-product of bad Example 2: Narrow passage workspace setups. Be cautious when pulling a cart in tight spaces as they require a higher degree of cart control precision and will increase the risk of overexertion. Here are some examples of space constraints. Example 1: Poor workspace setup – A temporary ramp is placed in front of Example 3: Bad Example 4: Improperly a penetration, which creates a limited housekeeping stored materials landing area for moving a cart onto the ramp. The landing is uneven and poorly set up. The worker has to overcome the uneven surface from the limited space and then pull along the ramp. This significantly increases the risk of narrow passage, extra force is needed to minimize overexertion. lane deviation. Example 2: Narrow passage – Workers have to Example 3: Bad housekeeping – Construction apply a greater force to position a cart into the narrow debris sits along the path, forcing workers to pull the passage. The extra force could be adding 12 percent cart through a tight space. Overcoming and pulling more pressure on the worker’s lower back and shoulover an obstacle in an open area is relatively easy. der. Additionally, when moving a cart across the
Example 1
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FLORIDA ROOFING | January 2023